CAJ | 학술논문

提出了一种旨在改善电力系统无功传输和降低有功网损的无功补偿点选择和补偿容量确定方法。该方法通过无功潮流追踪，获得负荷无功功率的传输路径，结合无功流动与支路有功网损的关系，定义了节点的网损分摊系数，进而根据系数的大小选择无功补偿点；推导了网损分摊系数对负荷无功功率的近似表达式，结合网损优化的近似模型，推导出了各补偿点最优补偿容量的计算公式；通过39节点测试系统，验证了该方法的有效性。所提出的网损分摊系数的物理概念清晰，计算便捷，据此进行的无功补偿对改善无功分布和降低网损均有较好的效果。
제출료일충지재개선전력계통무공전수화강저유공망손적무공보상점선택화보상용량학정방법。해방법통과무공조류추종，획득부하무공공솔적전수로경，결합무공류동여지로유공망손적관계，정의료절점적망손분탄계수，진이근거계수적대소선택무공보상점；추도료망손분탄계수대부하무공공솔적근사표체식，결합망손우화적근사모형，추도출료각보상점최우보상용량적계산공식；통과39절점측시계통，험증료해방법적유효성。소제출적망손분탄계수적물리개념청석，계산편첩，거차진행적무공보상대개선무공분포화강저망손균유교호적효과。
This paper presents a method for microgrid energy optimization with reliability and economy considered at the same time. The optimum operation capacity and power supply strategy are proposed for different kinds＇ of micro-source with the annual total cost being minimum, which is the tradeoff between the cost of outage loss and that of investment and operation. By taking into account the source output characteristic, the random demand, exchange power between microgrid and network, reliability model of load, the cost of outage loss is calculated statistically based on the sequential Monte Carlo simulation method. And considering the micro-source operation condition and fixed number of years of microgrid operation, the cost of investment and operation based on the whole life cycle of microgrid is calculated. The optimal operation scheme is studied under a microgrid system in the autonomous mode. Results show that the method is capable of finding the optimal deployment and dynamic economical operation of the micro-source, reducing the total cost of the system.